要使用BitBucket Java API，首先需要添加BitBucket Java API的依赖项。可以在项目的构建文件（如pom.xml）中添加以下依赖项：

    com.atlassian.bitbucket
    bitbucket-api
    5.0

然后，可以使用以下示例代码来演示如何使用BitBucket Java API进行操作：

import com.atlassian.bitbucket.auth.AuthenticationContext;
import com.atlassian.bitbucket.auth.AuthenticationResult;
import com.atlassian.bitbucket.auth.AuthenticationResultBuilder;
import com.atlassian.bitbucket.auth.AuthenticationToken;
import com.atlassian.bitbucket.auth.AuthenticationTokenExtractor;
import com.atlassian.bitbucket.auth.AuthorisationException;
import com.atlassian.bitbucket.auth.AuthorisationService;
import com.atlassian.bitbucket.auth.AuthorisedUser;
import com.atlassian.bitbucket.auth.InvalidAuthenticationTokenException;
import com.atlassian.bitbucket.auth.InvalidAuthorisationException;
import com.atlassian.bitbucket.auth.Permission;
import com.atlassian.bitbucket.auth.PermissionValidationService;
import com.atlassian.bitbucket.auth.TokenAuthenticationContext;
import com.atlassian.bitbucket.event.ApplicationEvent;
import com.atlassian.bitbucket.event.ApplicationEventListener;
import com.atlassian.bitbucket.event.CommitDiscussionAddedEvent;
import com.atlassian.bitbucket.event.branch.BranchCreatedEvent;
import com.atlassian.bitbucket.event.branch.BranchDeletedEvent;
import com.atlassian.bitbucket.event.branch.BranchMergedEvent;
import com.atlassian.bitbucket.event.branch.BranchModifiedEvent;
import com.atlassian.bitbucket.event.branch.BranchMovedEvent;
import com.atlassian.bitbucket.event.pull.PullRequestActivityEvent;
import com.atlassian.bitbucket.event.pull.PullRequestCommentAddedEvent;
import com.atlassian.bitbucket.event.pull.PullRequestCommentDeletedEvent;
import com.atlassian.bitbucket.event.pull.PullRequestCommentEditedEvent;
import com.atlassian.bitbucket.event.pull.PullRequestCommentRepliedEvent;
import com.atlassian.bitbucket.event.pull.PullRequestCommentTaskActivityEvent;
import com.atlassian.bitbucket.event.pull.PullRequestCommentTaskDeletedEvent;
import com.atlassian.bitbucket.event.pull.PullRequestCommentTaskEditedEvent;
import com.atlassian.bitbucket.event.pull.PullRequestCommentTaskRepliedEvent;
import com.atlassian.bitbucket.event.pull.PullRequestDeclinedEvent;
import com.atlassian.bitbucket.event.pull.PullRequestMergedEvent;
import com.atlassian.bitbucket.event.pull.PullRequestOpenedEvent;
import com.atlassian.bitbucket.event.pull.PullRequestParticipantApprovedEvent;
import com.atlassian.bitbucket.event.pull.PullRequestParticipantApprovedResetEvent;
import com.atlassian.bitbucket.event.pull.PullRequestParticipantUnapprovedEvent;
import com.atlassian.bitbucket.event.pull.PullRequestParticipantUnapprovedResetEvent;
import com.atlassian.bitbucket.event.pull.PullRequestReopenedEvent;
import com.atlassian.bitbucket.event.pull.PullRequestRescopedEvent;
import com.atlassian.bitbucket.event.pull.PullRequestReviewersEditedEvent;
import com.atlassian.bitbucket.event.pull.PullRequestUpdatedEvent;
import com.atlassian.bitbucket.event.pull.PullRequestVisitor;
import com.atlassian.bitbucket.event.pull.approval.PullRequestApprovalCreatedEvent;
import com.atlassian.bitbucket.event.pull.approval.PullRequestApprovalDeletedEvent;
import com.atlassian.bitbucket.event.pull.approval.PullRequestApprovalVisitor;
import com.atlassian.bitbucket.event.pull.approval.PullRequestApprovalsModifiedEvent;
import com.atlassian.bitbucket.event.repository.RepositoryDeletedEvent;
import com.atlassian.bitbucket.event.repository.RepositoryForkedEvent;
import com.atlassian.bitbucket.event.repository.RepositoryModifiedEvent;
import com.atlassian.bitbucket.event.repository.RepositoryPullRequestEvent;
import com.atlassian.bitbucket.event.repository.RepositoryPushEvent;
import com.atlassian.bitbucket.event.repository.RepositoryRefChangeEvent;
import com.atlassian.bitbucket.event.repository.RepositoryTagChangeEvent;
import com.atlassian.bitbucket.event.user.UserEvent;
import com.atlassian.bitbucket.event.user.UserLoginEvent;
import com.atlassian.bitbucket.pull.PullRequest;
import com.atlassian.bitbucket.pull.PullRequestService;
import com.atlassian.bitbucket.repository.Repository;
import com.atlassian.bitbucket.repository.RepositoryService;
import com.atlassian.bitbucket.server.ApplicationPropertiesService;
import com.atlassian.bitbucket.server.ApplicationProperty;
import com.atlassian.bitbucket.server.ApplicationPropertyVisitor;
import com.atlassian.bitbucket.server.ApplicationPropertyVisitorAdapter;
import com.atlassian.bitbucket.server.ApplicationPropertyVisitors;
import com.atlassian.bitbucket.server.ApplicationPropertyVisitors.ApplicationPropertyVisitorFactory;
import com.atlassian.bitbucket.server.ApplicationPropertyVisitors.DoubleApplicationPropertyVisitor;
import com.atlassian.bitbucket.server.ApplicationPropertyVisitors.IntegerApplicationPropertyVisitor;
import com.atlassian.bitbucket.server.ApplicationPropertyVisitors.LongApplicationPropertyVisitor;
import com.atlassian.bitbucket.server.ApplicationPropertyVisitors.StringApplication